Science Homework Help

This lab report is based on this videos: but just for the table of contents. It will have introduction, purpose, observations, procedures, table of physical constant, calculations, conclusion (discuss how the purpose of the lab was achieved by going over the most important points touched upon in the intro, briefly stating the procedures, and mentioning your results followed by sources of error), References. Plagiarism

Answer the questions:

1. Why is it important to apply the sample to the column in the smallest amount of solvent possible? What do you think would have happened if you had used too much solvent in this step?

2. what is the purpose of the sand on the top of the column? on the bottom of the column?

3. now that you have experienced both techniques, compare and contrast melting point determination and TLC as methods for detecting impurities in a solid sample?

4. an orange compound, dissolved in dichloromethane, is added to chromatography column. the elution is begun using hexane as the solvent. After 6L of solvent was passed through the column, the orange band had still not traveled down the column appreciably . What should be done to make this experiment work better.

5. a sample was placed on a chromatography column. Dichloromethane was used as the eluting solvent. No separation of the components in the sample was observed. What might have gone wrong? How would you change the experiment in order to overcome this problem?

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